src/text2.C

   1 /**
   2  * \file text2.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Asger Alstrup
   7  * \author Lars Gullik Bjønnes
   8  * \author Alfredo Braunstein
   9  * \author Jean-Marc Lasgouttes
  10  * \author Angus Leeming
  11  * \author John Levon
  12  * \author André Pönitz
  13  * \author Allan Rae
  14  * \author Dekel Tsur
  15  * \author Jürgen Vigna
  16  *
  17  * Full author contact details are available in file CREDITS.
  18  */
  19
  20 #include <config.h>
  21
  22 #include "lyxtext.h"
  23 #include "LString.h"
  24 #include "Lsstream.h"
  25 #include "paragraph.h"
  26 #include "funcrequest.h"
  27 #include "frontends/LyXView.h"
  28 #include "undo_funcs.h"
  29 #include "buffer.h"
  30 #include "buffer_funcs.h"
  31 #include "bufferparams.h"
  32 #include "errorlist.h"
  33 #include "gettext.h"
  34 #include "BufferView.h"
  35 #include "CutAndPaste.h"
  36 #include "frontends/Painter.h"
  37 #include "frontends/font_metrics.h"
  38 #include "debug.h"
  39 #include "lyxrc.h"
  40 #include "FloatList.h"
  41 #include "language.h"
  42 #include "ParagraphParameters.h"
  43 #include "counters.h"
  44 #include "lyxrow_funcs.h"
  45 #include "metricsinfo.h"
  46 #include "paragraph_funcs.h"
  47
  48 #include "insets/insetbibitem.h"
  49 #include "insets/insetenv.h"
  50 #include "insets/insetfloat.h"
  51 #include "insets/insetwrap.h"
  52
  53 #include "support/LAssert.h"
  54 #include "support/textutils.h"
  55 #include "support/lstrings.h"
  56
  57 #include <boost/tuple/tuple.hpp>
  58
  59 #include <algorithm>
  60
  61 using namespace lyx::support;
  62
  63 using std::vector;
  64 using std::copy;
  65 using std::endl;
  66 using std::find;
  67 using std::pair;
  68 using lyx::pos_type;
  69
  70
  71 LyXText::LyXText(BufferView * bv, InsetText * inset, bool ininset,
  72           ParagraphList & paragraphs)
  73         : height(0), width(0), anchor_y_(0),
  74           inset_owner(inset), the_locking_inset(0), bv_owner(bv),
  75           in_inset_(ininset), paragraphs_(paragraphs)
  76 {
  77 }
  78
  79
  80 void LyXText::init(BufferView * bview)
  81 {
  82         bv_owner = bview;
  83
  84         ParagraphList::iterator const beg = ownerParagraphs().begin();
  85         ParagraphList::iterator const end = ownerParagraphs().end();
  86         for (ParagraphList::iterator pit = beg; pit != end; ++pit)
  87                 pit->rows.clear();
  88
  89         width = 0;
  90         height = 0;
  91
  92         anchor_y_ = 0;
  93
  94         current_font = getFont(beg, 0);
  95
  96         redoParagraphs(beg, end);
  97         setCursorIntern(beg, 0);
  98         selection.cursor = cursor;
  99
 100         updateCounters();
 101 }
 102
 103
 104 // Gets the fully instantiated font at a given position in a paragraph
 105 // Basically the same routine as Paragraph::getFont() in paragraph.C.
 106 // The difference is that this one is used for displaying, and thus we
 107 // are allowed to make cosmetic improvements. For instance make footnotes
 108 // smaller. (Asger)
 109 LyXFont LyXText::getFont(ParagraphList::iterator pit, pos_type pos) const
 110 {
 111         Assert(pos >= 0);
 112
 113         LyXLayout_ptr const & layout = pit->layout();
 114 #warning broken?
 115         BufferParams const & params = bv()->buffer()->params;
 116
 117         // We specialize the 95% common case:
 118         if (!pit->getDepth()) {
 119                 if (layout->labeltype == LABEL_MANUAL
 120                     && pos < pit->beginningOfBody()) {
 121                         // 1% goes here
 122                         LyXFont f = pit->getFontSettings(params, pos);
 123                         if (pit->inInset())
 124                                 pit->inInset()->getDrawFont(f);
 125                         return f.realize(layout->reslabelfont);
 126                 } else {
 127                         LyXFont f = pit->getFontSettings(params, pos);
 128                         if (pit->inInset())
 129                                 pit->inInset()->getDrawFont(f);
 130                         return f.realize(layout->resfont);
 131                 }
 132         }
 133
 134         // The uncommon case need not be optimized as much
 135
 136         LyXFont layoutfont;
 137
 138         if (pos < pit->beginningOfBody()) {
 139                 // 1% goes here
 140                 layoutfont = layout->labelfont;
 141         } else {
 142                 // 99% goes here
 143                 layoutfont = layout->font;
 144         }
 145
 146         LyXFont tmpfont = pit->getFontSettings(params, pos);
 147         tmpfont.realize(layoutfont);
 148
 149         if (pit->inInset())
 150                 pit->inInset()->getDrawFont(tmpfont);
 151
 152         // Realize with the fonts of lesser depth.
 153         tmpfont.realize(outerFont(pit, ownerParagraphs()));
 154         tmpfont.realize(defaultfont_);
 155
 156         return tmpfont;
 157 }
 158
 159
 160 LyXFont LyXText::getLayoutFont(ParagraphList::iterator pit) const
 161 {
 162         LyXLayout_ptr const & layout = pit->layout();
 163
 164         if (!pit->getDepth())
 165                 return layout->resfont;
 166
 167         LyXFont font = layout->font;
 168         // Realize with the fonts of lesser depth.
 169         font.realize(outerFont(pit, ownerParagraphs()));
 170         font.realize(defaultfont_);
 171
 172         return font;
 173 }
 174
 175
 176 LyXFont LyXText::getLabelFont(ParagraphList::iterator pit) const
 177 {
 178         LyXLayout_ptr const & layout = pit->layout();
 179
 180         if (!pit->getDepth())
 181                 return layout->reslabelfont;
 182
 183         LyXFont font = layout->labelfont;
 184         // Realize with the fonts of lesser depth.
 185         font.realize(outerFont(pit, ownerParagraphs()));
 186         font.realize(defaultfont_);
 187
 188         return font;
 189 }
 190
 191
 192 void LyXText::setCharFont(ParagraphList::iterator pit,
 193                           pos_type pos, LyXFont const & fnt,
 194                           bool toggleall)
 195 {
 196         BufferParams const & params = bv()->buffer()->params;
 197         LyXFont font = getFont(pit, pos);
 198         font.update(fnt, params.language, toggleall);
 199         // Let the insets convert their font
 200         if (pit->isInset(pos)) {
 201                 InsetOld * inset = pit->getInset(pos);
 202                 if (isEditableInset(inset)) {
 203                         static_cast<UpdatableInset *>(inset)
 204                                 ->setFont(bv(), fnt, toggleall, true);
 205                 }
 206         }
 207
 208         // Plug through to version below:
 209         setCharFont(pit, pos, font);
 210 }
 211
 212
 213 void LyXText::setCharFont(
 214         ParagraphList::iterator pit, pos_type pos, LyXFont const & fnt)
 215 {
 216         LyXFont font = fnt;
 217         LyXLayout_ptr const & layout = pit->layout();
 218
 219         // Get concrete layout font to reduce against
 220         LyXFont layoutfont;
 221
 222         if (pos < pit->beginningOfBody())
 223                 layoutfont = layout->labelfont;
 224         else
 225                 layoutfont = layout->font;
 226
 227         // Realize against environment font information
 228         if (pit->getDepth()) {
 229                 ParagraphList::iterator tp = pit;
 230                 while (!layoutfont.resolved() &&
 231                        tp != ownerParagraphs().end() &&
 232                        tp->getDepth()) {
 233                         tp = outerHook(tp, ownerParagraphs());
 234                         if (tp != ownerParagraphs().end())
 235                                 layoutfont.realize(tp->layout()->font);
 236                 }
 237         }
 238
 239         layoutfont.realize(defaultfont_);
 240
 241         // Now, reduce font against full layout font
 242         font.reduce(layoutfont);
 243
 244         pit->setFont(pos, font);
 245 }
 246
 247
 248 InsetOld * LyXText::getInset() const
 249 {
 250         ParagraphList::iterator pit = cursor.par();
 251         pos_type const pos = cursor.pos();
 252
 253         if (pos < pit->size() && pit->isInset(pos)) {
 254                 return pit->getInset(pos);
 255         }
 256         return 0;
 257 }
 258
 259
 260 void LyXText::toggleInset()
 261 {
 262         InsetOld * inset = getInset();
 263         // is there an editable inset at cursor position?
 264         if (!isEditableInset(inset)) {
 265                 // No, try to see if we are inside a collapsable inset
 266                 if (inset_owner && inset_owner->owner()
 267                     && inset_owner->owner()->isOpen()) {
 268                         bv()->unlockInset(inset_owner->owner());
 269                         inset_owner->owner()->close(bv());
 270                         bv()->getLyXText()->cursorRight(bv());
 271                 }
 272                 return;
 273         }
 274         //bv()->owner()->message(inset->editMessage());
 275
 276         // do we want to keep this?? (JMarc)
 277         if (!isHighlyEditableInset(inset))
 278                 recordUndo(bv(), Undo::ATOMIC);
 279
 280         if (inset->isOpen())
 281                 inset->close(bv());
 282         else
 283                 inset->open(bv());
 284
 285         bv()->updateInset(inset);
 286 }
 287
 288
 289 /* used in setlayout */
 290 // Asger is not sure we want to do this...
 291 void LyXText::makeFontEntriesLayoutSpecific(BufferParams const & params,
 292                                             Paragraph & par)
 293 {
 294         LyXLayout_ptr const & layout = par.layout();
 295         pos_type const psize = par.size();
 296
 297         LyXFont layoutfont;
 298         for (pos_type pos = 0; pos < psize; ++pos) {
 299                 if (pos < par.beginningOfBody())
 300                         layoutfont = layout->labelfont;
 301                 else
 302                         layoutfont = layout->font;
 303
 304                 LyXFont tmpfont = par.getFontSettings(params, pos);
 305                 tmpfont.reduce(layoutfont);
 306                 par.setFont(pos, tmpfont);
 307         }
 308 }
 309
 310
 311 ParagraphList::iterator
 312 LyXText::setLayout(LyXCursor & cur, LyXCursor & sstart_cur,
 313                    LyXCursor & send_cur,
 314                    string const & layout)
 315 {
 316         ParagraphList::iterator endpit = boost::next(send_cur.par());
 317         ParagraphList::iterator undoendpit = endpit;
 318         ParagraphList::iterator pars_end = ownerParagraphs().end();
 319
 320         if (endpit != pars_end && endpit->getDepth()) {
 321                 while (endpit != pars_end && endpit->getDepth()) {
 322                         ++endpit;
 323                         undoendpit = endpit;
 324                 }
 325         } else if (endpit != pars_end) {
 326                 // because of parindents etc.
 327                 ++endpit;
 328         }
 329
 330         recordUndo(bv(), Undo::ATOMIC, sstart_cur.par(), boost::prior(undoendpit));
 331
 332         // ok we have a selection. This is always between sstart_cur
 333         // and sel_end cursor
 334         cur = sstart_cur;
 335         ParagraphList::iterator pit = sstart_cur.par();
 336         ParagraphList::iterator epit = boost::next(send_cur.par());
 337
 338         LyXLayout_ptr const & lyxlayout =
 339                 bv()->buffer()->params.getLyXTextClass()[layout];
 340
 341         do {
 342                 pit->applyLayout(lyxlayout);
 343                 makeFontEntriesLayoutSpecific(bv()->buffer()->params, *pit);
 344                 pit->params().spaceTop(lyxlayout->fill_top ?
 345                                          VSpace(VSpace::VFILL)
 346                                          : VSpace(VSpace::NONE));
 347                 pit->params().spaceBottom(lyxlayout->fill_bottom ?
 348                                             VSpace(VSpace::VFILL)
 349                                             : VSpace(VSpace::NONE));
 350                 if (lyxlayout->margintype == MARGIN_MANUAL)
 351                         pit->setLabelWidthString(lyxlayout->labelstring());
 352                 cur.par(pit);
 353                 ++pit;
 354         } while (pit != epit);
 355
 356         return endpit;
 357 }
 358
 359
 360 // set layout over selection and make a total rebreak of those paragraphs
 361 void LyXText::setLayout(string const & layout)
 362 {
 363         LyXCursor tmpcursor = cursor;  // store the current cursor
 364
 365         // if there is no selection just set the layout
 366         // of the current paragraph
 367         if (!selection.set()) {
 368                 selection.start = cursor;  // dummy selection
 369                 selection.end = cursor;
 370         }
 371
 372         // special handling of new environment insets
 373         BufferParams const & params = bv()->buffer()->params;
 374         LyXLayout_ptr const & lyxlayout = params.getLyXTextClass()[layout];
 375         if (lyxlayout->is_environment) {
 376                 // move everything in a new environment inset
 377                 lyxerr << "setting layout " << layout << endl;
 378                 bv()->owner()->dispatch(FuncRequest(LFUN_HOME));
 379                 bv()->owner()->dispatch(FuncRequest(LFUN_ENDSEL));
 380                 bv()->owner()->dispatch(FuncRequest(LFUN_CUT));
 381                 InsetOld * inset = new InsetEnvironment(params, layout);
 382                 if (bv()->insertInset(inset)) {
 383                         //inset->edit(bv());
 384                         //bv()->owner()->dispatch(FuncRequest(LFUN_PASTE));
 385                 }
 386                 else
 387                         delete inset;
 388                 return;
 389         }
 390
 391         ParagraphList::iterator endpit = setLayout(cursor, selection.start,
 392                                                    selection.end, layout);
 393         redoParagraphs(selection.start.par(), endpit);
 394
 395         // we have to reset the selection, because the
 396         // geometry could have changed
 397         setCursor(selection.start.par(), selection.start.pos(), false);
 398         selection.cursor = cursor;
 399         setCursor(selection.end.par(), selection.end.pos(), false);
 400         updateCounters();
 401         clearSelection();
 402         setSelection();
 403         setCursor(tmpcursor.par(), tmpcursor.pos(), true);
 404 }
 405
 406
 407 bool LyXText::changeDepth(bv_funcs::DEPTH_CHANGE type, bool test_only)
 408 {
 409         ParagraphList::iterator pit = cursor.par();
 410         ParagraphList::iterator end = cursor.par();
 411         ParagraphList::iterator start = pit;
 412
 413         if (selection.set()) {
 414                 pit = selection.start.par();
 415                 end = selection.end.par();
 416                 start = pit;
 417         }
 418
 419         ParagraphList::iterator pastend = boost::next(end);
 420
 421         if (!test_only)
 422                 recordUndo(bv(), Undo::ATOMIC, start, end);
 423
 424         bool changed = false;
 425
 426         int prev_after_depth = 0;
 427 #warning parlist ... could be nicer ?
 428         if (start != ownerParagraphs().begin()) {
 429                 prev_after_depth = boost::prior(start)->getMaxDepthAfter();
 430         }
 431
 432         while (true) {
 433                 int const depth = pit->params().depth();
 434                 if (type == bv_funcs::INC_DEPTH) {
 435                         if (depth < prev_after_depth
 436                             && pit->layout()->labeltype != LABEL_BIBLIO) {
 437                                 changed = true;
 438                                 if (!test_only)
 439                                         pit->params().depth(depth + 1);
 440                         }
 441                 } else if (depth) {
 442                         changed = true;
 443                         if (!test_only)
 444                                 pit->params().depth(depth - 1);
 445                 }
 446
 447                 prev_after_depth = pit->getMaxDepthAfter();
 448
 449                 if (pit == end) {
 450                         break;
 451                 }
 452
 453                 ++pit;
 454         }
 455
 456         if (test_only)
 457                 return changed;
 458
 459         redoParagraphs(start, pastend);
 460
 461         // We need to actually move the text->cursor. I don't
 462         // understand why ...
 463         LyXCursor tmpcursor = cursor;
 464
 465         // we have to reset the visual selection because the
 466         // geometry could have changed
 467         if (selection.set()) {
 468                 setCursor(selection.start.par(), selection.start.pos());
 469                 selection.cursor = cursor;
 470                 setCursor(selection.end.par(), selection.end.pos());
 471         }
 472
 473         // this handles the counter labels, and also fixes up
 474         // depth values for follow-on (child) paragraphs
 475         updateCounters();
 476
 477         setSelection();
 478         setCursor(tmpcursor.par(), tmpcursor.pos());
 479
 480         return changed;
 481 }
 482
 483
 484 // set font over selection and make a total rebreak of those paragraphs
 485 void LyXText::setFont(LyXFont const & font, bool toggleall)
 486 {
 487         // if there is no selection just set the current_font
 488         if (!selection.set()) {
 489                 // Determine basis font
 490                 LyXFont layoutfont;
 491                 if (cursor.pos() < cursor.par()->beginningOfBody()) {
 492                         layoutfont = getLabelFont(cursor.par());
 493                 } else {
 494                         layoutfont = getLayoutFont(cursor.par());
 495                 }
 496                 // Update current font
 497                 real_current_font.update(font,
 498                                          bv()->buffer()->params.language,
 499                                          toggleall);
 500
 501                 // Reduce to implicit settings
 502                 current_font = real_current_font;
 503                 current_font.reduce(layoutfont);
 504                 // And resolve it completely
 505                 real_current_font.realize(layoutfont);
 506
 507                 return;
 508         }
 509
 510         LyXCursor tmpcursor = cursor; // store the current cursor
 511
 512         // ok we have a selection. This is always between sel_start_cursor
 513         // and sel_end cursor
 514
 515         recordUndo(bv(), Undo::ATOMIC, selection.start.par(), selection.end.par());
 516         freezeUndo();
 517         cursor = selection.start;
 518         while (cursor.par() != selection.end.par() ||
 519                cursor.pos() < selection.end.pos())
 520         {
 521                 if (cursor.pos() < cursor.par()->size()) {
 522                         // an open footnote should behave like a closed one
 523                         setCharFont(cursor.par(), cursor.pos(),
 524                                     font, toggleall);
 525                         cursor.pos(cursor.pos() + 1);
 526                 } else {
 527                         cursor.pos(0);
 528                         cursor.par(boost::next(cursor.par()));
 529                 }
 530         }
 531         unFreezeUndo();
 532
 533         redoParagraph(selection.start.par());
 534
 535         // we have to reset the selection, because the
 536         // geometry could have changed, but we keep
 537         // it for user convenience
 538         setCursor(selection.start.par(), selection.start.pos());
 539         selection.cursor = cursor;
 540         setCursor(selection.end.par(), selection.end.pos());
 541         setSelection();
 542         setCursor(tmpcursor.par(), tmpcursor.pos(), true,
 543                   tmpcursor.boundary());
 544 }
 545
 546
 547 int LyXText::redoParagraphInternal(ParagraphList::iterator pit)
 548 {
 549         RowList::iterator rit = pit->rows.begin();
 550         RowList::iterator end = pit->rows.end();
 551
 552         // remove rows of paragraph, keep track of height changes
 553         for (int i = 0; rit != end; ++rit, ++i)
 554                 height -= rit->height();
 555         pit->rows.clear();
 556
 557         // redo insets
 558         InsetList::iterator ii = pit->insetlist.begin();
 559         InsetList::iterator iend = pit->insetlist.end();
 560         for (; ii != iend; ++ii) {
 561                 Dimension dim;
 562                 MetricsInfo mi(bv(), getFont(pit, ii->pos), workWidth());
 563                 ii->inset->metrics(mi, dim);
 564         }
 565
 566         // rebreak the paragraph
 567         for (pos_type z = 0; z < pit->size() + 1; ) {
 568                 Row row(z);
 569                 z = rowBreakPoint(pit, row) + 1;
 570                 row.end(z);
 571                 pit->rows.push_back(row);
 572         }
 573
 574         int par_width = 0;
 575         // set height and fill and width of rows
 576         int const ww = workWidth();
 577         for (rit = pit->rows.begin(); rit != end; ++rit) {
 578                 int const f = fill(pit, rit, ww);
 579                 int const w = ww - f;
 580                 par_width = std::max(par_width, w);
 581                 rit->fill(f);
 582                 rit->width(w);
 583                 prepareToPrint(pit, rit);
 584                 setHeightOfRow(pit, rit);
 585                 height += rit->height();
 586         }
 587
 588         //lyxerr << "redoParagraph: " << pit->rows.size() << " rows\n";
 589         return par_width;
 590 }
 591
 592
 593 int LyXText::redoParagraphs(ParagraphList::iterator start,
 594   ParagraphList::iterator end)
 595 {
 596         int pars_width = 0;
 597         for ( ; start != end; ++start) {
 598                 int par_width = redoParagraphInternal(start);
 599                 pars_width = std::max(par_width, pars_width);
 600         }
 601         updateRowPositions();
 602         return pars_width;
 603 }
 604
 605
 606 void LyXText::redoParagraph(ParagraphList::iterator pit)
 607 {
 608         redoParagraphInternal(pit);
 609         updateRowPositions();
 610 }
 611
 612
 613 void LyXText::fullRebreak()
 614 {
 615         redoParagraphs(ownerParagraphs().begin(), ownerParagraphs().end());
 616         redoCursor();
 617         selection.cursor = cursor;
 618 }
 619
 620
 621 void LyXText::metrics(MetricsInfo & mi, Dimension & dim)
 622 {
 623         //lyxerr << "LyXText::metrics: width: " << mi.base.textwidth
 624         //      << " workWidth: " << workWidth() << endl;
 625         //Assert(mi.base.textwidth);
 626
 627         // rebuild row cache
 628         width  = 0;
 629         ///height = 0;
 630
 631         //anchor_y_ = 0;
 632         width = redoParagraphs(ownerParagraphs().begin(), ownerParagraphs().end());
 633
 634         // final dimension
 635         dim.asc = firstRow()->ascent_of_text();
 636         dim.des = height - dim.asc;
 637         dim.wid = std::max(mi.base.textwidth, int(width));
 638 }
 639
 640
 641 // important for the screen
 642
 643
 644 // the cursor set functions have a special mechanism. When they
 645 // realize, that you left an empty paragraph, they will delete it.
 646 // They also delete the corresponding row
 647
 648 // need the selection cursor:
 649 void LyXText::setSelection()
 650 {
 651         TextCursor::setSelection();
 652 }
 653
 654
 655
 656 void LyXText::clearSelection()
 657 {
 658         TextCursor::clearSelection();
 659
 660         // reset this in the bv_owner!
 661         if (bv_owner && bv_owner->text)
 662                 bv_owner->text->xsel_cache.set(false);
 663 }
 664
 665
 666 void LyXText::cursorHome()
 667 {
 668         setCursor(cursor.par(), cursorRow()->pos());
 669 }
 670
 671
 672 void LyXText::cursorEnd()
 673 {
 674         if (cursor.par()->empty())
 675                 return;
 676
 677         RowList::iterator rit = cursorRow();
 678         RowList::iterator next_rit = boost::next(rit);
 679         RowList::iterator end = boost::next(rit);
 680         ParagraphList::iterator pit = cursor.par();
 681         pos_type last_pos = lastPos(*pit, rit);
 682
 683         if (next_rit == end) {
 684                 ++last_pos;
 685         } else {
 686                 if (pit->empty() ||
 687                     (pit->getChar(last_pos) != ' ' && !pit->isNewline(last_pos))) {
 688                         ++last_pos;
 689                 }
 690         }
 691
 692         setCursor(pit, last_pos);
 693 }
 694
 695
 696 void LyXText::cursorTop()
 697 {
 698         setCursor(ownerParagraphs().begin(), 0);
 699 }
 700
 701
 702 void LyXText::cursorBottom()
 703 {
 704         ParagraphList::iterator lastpit =
 705                 boost::prior(ownerParagraphs().end());
 706         setCursor(lastpit, lastpit->size());
 707 }
 708
 709
 710 void LyXText::toggleFree(LyXFont const & font, bool toggleall)
 711 {
 712         // If the mask is completely neutral, tell user
 713         if (font == LyXFont(LyXFont::ALL_IGNORE)) {
 714                 // Could only happen with user style
 715                 bv()->owner()->message(_("No font change defined. Use Character under the Layout menu to define font change."));
 716                 return;
 717         }
 718
 719         // Try implicit word selection
 720         // If there is a change in the language the implicit word selection
 721         // is disabled.
 722         LyXCursor resetCursor = cursor;
 723         bool implicitSelection = (font.language() == ignore_language
 724                                   && font.number() == LyXFont::IGNORE)
 725                 ? selectWordWhenUnderCursor(lyx::WHOLE_WORD_STRICT) : false;
 726
 727         // Set font
 728         setFont(font, toggleall);
 729
 730         // Implicit selections are cleared afterwards
 731         //and cursor is set to the original position.
 732         if (implicitSelection) {
 733                 clearSelection();
 734                 cursor = resetCursor;
 735                 setCursor(cursor.par(), cursor.pos());
 736                 selection.cursor = cursor;
 737         }
 738 }
 739
 740
 741 string LyXText::getStringToIndex()
 742 {
 743         // Try implicit word selection
 744         // If there is a change in the language the implicit word selection
 745         // is disabled.
 746         LyXCursor const reset_cursor = cursor;
 747         bool const implicitSelection =
 748                 selectWordWhenUnderCursor(lyx::PREVIOUS_WORD);
 749
 750         string idxstring;
 751         if (!selection.set())
 752                 bv()->owner()->message(_("Nothing to index!"));
 753         else if (selection.start.par() != selection.end.par())
 754                 bv()->owner()->message(_("Cannot index more than one paragraph!"));
 755         else
 756                 idxstring = selectionAsString(*bv()->buffer(), false);
 757
 758         // Reset cursors to their original position.
 759         cursor = reset_cursor;
 760         setCursor(cursor.par(), cursor.pos());
 761         selection.cursor = cursor;
 762
 763         // Clear the implicit selection.
 764         if (implicitSelection)
 765                 clearSelection();
 766
 767         return idxstring;
 768 }
 769
 770
 771 // the DTP switches for paragraphs. LyX will store them in the first
 772 // physical paragraph. When a paragraph is broken, the top settings rest,
 773 // the bottom settings are given to the new one. So I can make sure,
 774 // they do not duplicate themself and you cannnot make dirty things with
 775 // them!
 776
 777 void LyXText::setParagraph(bool line_top, bool line_bottom,
 778                            bool pagebreak_top, bool pagebreak_bottom,
 779                            VSpace const & space_top,
 780                            VSpace const & space_bottom,
 781                            Spacing const & spacing,
 782                            LyXAlignment align,
 783                            string const & labelwidthstring,
 784                            bool noindent)
 785 {
 786         LyXCursor tmpcursor = cursor;
 787         if (!selection.set()) {
 788                 selection.start = cursor;
 789                 selection.end = cursor;
 790         }
 791
 792         // make sure that the depth behind the selection are restored, too
 793         ParagraphList::iterator endpit = boost::next(selection.end.par());
 794         ParagraphList::iterator undoendpit = endpit;
 795         ParagraphList::iterator pars_end = ownerParagraphs().end();
 796
 797         if (endpit != pars_end && endpit->getDepth()) {
 798                 while (endpit != pars_end && endpit->getDepth()) {
 799                         ++endpit;
 800                         undoendpit = endpit;
 801                 }
 802         } else if (endpit != pars_end) {
 803                 // because of parindents etc.
 804                 ++endpit;
 805         }
 806
 807         recordUndo(bv(), Undo::ATOMIC, selection.start.par(),
 808                 boost::prior(undoendpit));
 809
 810
 811         ParagraphList::iterator tmppit = selection.end.par();
 812
 813         while (tmppit != boost::prior(selection.start.par())) {
 814                 setCursor(tmppit, 0);
 815
 816                 ParagraphList::iterator pit = cursor.par();
 817                 ParagraphParameters & params = pit->params();
 818
 819                 params.lineTop(line_top);
 820                 params.lineBottom(line_bottom);
 821                 params.pagebreakTop(pagebreak_top);
 822                 params.pagebreakBottom(pagebreak_bottom);
 823                 params.spaceTop(space_top);
 824                 params.spaceBottom(space_bottom);
 825                 params.spacing(spacing);
 826                 // does the layout allow the new alignment?
 827                 LyXLayout_ptr const & layout = pit->layout();
 828
 829                 if (align == LYX_ALIGN_LAYOUT)
 830                         align = layout->align;
 831                 if (align & layout->alignpossible) {
 832                         if (align == layout->align)
 833                                 params.align(LYX_ALIGN_LAYOUT);
 834                         else
 835                                 params.align(align);
 836                 }
 837                 pit->setLabelWidthString(labelwidthstring);
 838                 params.noindent(noindent);
 839                 tmppit = boost::prior(pit);
 840         }
 841
 842         redoParagraphs(selection.start.par(), endpit);
 843
 844         clearSelection();
 845         setCursor(selection.start.par(), selection.start.pos());
 846         selection.cursor = cursor;
 847         setCursor(selection.end.par(), selection.end.pos());
 848         setSelection();
 849         setCursor(tmpcursor.par(), tmpcursor.pos());
 850         if (inset_owner)
 851                 bv()->updateInset(inset_owner);
 852 }
 853
 854
 855 // set the counter of a paragraph. This includes the labels
 856 void LyXText::setCounter(Buffer const & buf, ParagraphList::iterator pit)
 857 {
 858         LyXTextClass const & textclass = buf.params.getLyXTextClass();
 859         LyXLayout_ptr const & layout = pit->layout();
 860
 861         if (pit != ownerParagraphs().begin()) {
 862
 863                 pit->params().appendix(boost::prior(pit)->params().appendix());
 864                 if (!pit->params().appendix() &&
 865                     pit->params().startOfAppendix()) {
 866                         pit->params().appendix(true);
 867                         textclass.counters().reset();
 868                 }
 869                 pit->enumdepth = boost::prior(pit)->enumdepth;
 870                 pit->itemdepth = boost::prior(pit)->itemdepth;
 871         } else {
 872                 pit->params().appendix(pit->params().startOfAppendix());
 873                 pit->enumdepth = 0;
 874                 pit->itemdepth = 0;
 875         }
 876
 877         // Maybe we have to increment the enumeration depth.
 878         // BUT, enumeration in a footnote is considered in isolation from its
 879         //      surrounding paragraph so don't increment if this is the
 880         //      first line of the footnote
 881         // AND, bibliographies can't have their depth changed ie. they
 882         //      are always of depth 0
 883         if (pit != ownerParagraphs().begin()
 884             && boost::prior(pit)->getDepth() < pit->getDepth()
 885             && boost::prior(pit)->layout()->labeltype == LABEL_COUNTER_ENUMI
 886             && pit->enumdepth < 3
 887             && layout->labeltype != LABEL_BIBLIO) {
 888                 pit->enumdepth++;
 889         }
 890
 891         // Maybe we have to decrement the enumeration depth, see note above
 892         if (pit != ownerParagraphs().begin()
 893             && boost::prior(pit)->getDepth() > pit->getDepth()
 894             && layout->labeltype != LABEL_BIBLIO) {
 895                 pit->enumdepth = depthHook(pit, ownerParagraphs(),
 896                                            pit->getDepth())->enumdepth;
 897         }
 898
 899         if (!pit->params().labelString().empty()) {
 900                 pit->params().labelString(string());
 901         }
 902
 903         if (layout->margintype == MARGIN_MANUAL) {
 904                 if (pit->params().labelWidthString().empty())
 905                         pit->setLabelWidthString(layout->labelstring());
 906         } else {
 907                 pit->setLabelWidthString(string());
 908         }
 909
 910         // is it a layout that has an automatic label?
 911         if (layout->labeltype >= LABEL_COUNTER_CHAPTER) {
 912                 int const i = layout->labeltype - LABEL_COUNTER_CHAPTER;
 913
 914                 ostringstream s;
 915
 916                 if (i >= 0 && i <= buf.params.secnumdepth) {
 917                         string numbertype;
 918                         string langtype;
 919
 920                         textclass.counters().step(layout->latexname());
 921
 922                         // Is there a label? Useful for Chapter layout
 923                         if (!pit->params().appendix()) {
 924                                 s << buf.B_(layout->labelstring());
 925                         } else {
 926                                 s << buf.B_(layout->labelstring_appendix());
 927                         }
 928
 929                         // Use of an integer is here less than elegant. For now.
 930                         int head = textclass.maxcounter() - LABEL_COUNTER_CHAPTER;
 931                         if (!pit->params().appendix()) {
 932                                 numbertype = "sectioning";
 933                         } else {
 934                                 numbertype = "appendix";
 935                                 if (pit->isRightToLeftPar(buf.params))
 936                                         langtype = "hebrew";
 937                                 else
 938                                         langtype = "latin";
 939                         }
 940
 941                         s << " "
 942                           << textclass.counters()
 943                                 .numberLabel(layout->latexname(),
 944                                              numbertype, langtype, head);
 945
 946                         pit->params().labelString(STRCONV(s.str()));
 947
 948                         // reset enum counters
 949                         textclass.counters().reset("enum");
 950                 } else if (layout->labeltype < LABEL_COUNTER_ENUMI) {
 951                         textclass.counters().reset("enum");
 952                 } else if (layout->labeltype == LABEL_COUNTER_ENUMI) {
 953                         // FIXME
 954                         // Yes I know this is a really, really! bad solution
 955                         // (Lgb)
 956                         string enumcounter("enum");
 957
 958                         switch (pit->enumdepth) {
 959                         case 2:
 960                                 enumcounter += 'i';
 961                         case 1:
 962                                 enumcounter += 'i';
 963                         case 0:
 964                                 enumcounter += 'i';
 965                                 break;
 966                         case 3:
 967                                 enumcounter += "iv";
 968                                 break;
 969                         default:
 970                                 // not a valid enumdepth...
 971                                 break;
 972                         }
 973
 974                         textclass.counters().step(enumcounter);
 975
 976                         s << textclass.counters()
 977                                 .numberLabel(enumcounter, "enumeration");
 978                         pit->params().labelString(STRCONV(s.str()));
 979                 }
 980         } else if (layout->labeltype == LABEL_BIBLIO) {// ale970302
 981                 textclass.counters().step("bibitem");
 982                 int number = textclass.counters().value("bibitem");
 983                 if (pit->bibitem()) {
 984                         pit->bibitem()->setCounter(number);
 985                         pit->params().labelString(layout->labelstring());
 986                 }
 987                 // In biblio should't be following counters but...
 988         } else {
 989                 string s = buf.B_(layout->labelstring());
 990
 991                 // the caption hack:
 992                 if (layout->labeltype == LABEL_SENSITIVE) {
 993                         ParagraphList::iterator end = ownerParagraphs().end();
 994                         ParagraphList::iterator tmppit = pit;
 995                         InsetOld * in = 0;
 996                         bool isOK = false;
 997                         while (tmppit != end && tmppit->inInset()
 998                                // the single '=' is intended below
 999                                && (in = tmppit->inInset()->owner()))
1000                         {
1001                                 if (in->lyxCode() == InsetOld::FLOAT_CODE ||
1002                                     in->lyxCode() == InsetOld::WRAP_CODE) {
1003                                         isOK = true;
1004                                         break;
1005                                 } else {
1006                                         Paragraph const * owner = &ownerPar(buf, in);
1007                                         tmppit = ownerParagraphs().begin();
1008                                         for ( ; tmppit != end; ++tmppit)
1009                                                 if (&*tmppit == owner)
1010                                                         break;
1011                                 }
1012                         }
1013
1014                         if (isOK) {
1015                                 string type;
1016
1017                                 if (in->lyxCode() == InsetOld::FLOAT_CODE)
1018                                         type = static_cast<InsetFloat*>(in)->params().type;
1019                                 else if (in->lyxCode() == InsetOld::WRAP_CODE)
1020                                         type = static_cast<InsetWrap*>(in)->params().type;
1021                                 else
1022                                         Assert(0);
1023
1024                                 Floating const & fl = textclass.floats().getType(type);
1025
1026                                 textclass.counters().step(fl.type());
1027
1028                                 // Doesn't work... yet.
1029                                 s = bformat(_("%1$s #:"), buf.B_(fl.name()));
1030                         } else {
1031                                 // par->SetLayout(0);
1032                                 // s = layout->labelstring;
1033                                 s = _("Senseless: ");
1034                         }
1035                 }
1036                 pit->params().labelString(s);
1037
1038                 // reset the enumeration counter. They are always reset
1039                 // when there is any other layout between
1040                 // Just fall-through between the cases so that all
1041                 // enum counters deeper than enumdepth is also reset.
1042                 switch (pit->enumdepth) {
1043                 case 0:
1044                         textclass.counters().reset("enumi");
1045                 case 1:
1046                         textclass.counters().reset("enumii");
1047                 case 2:
1048                         textclass.counters().reset("enumiii");
1049                 case 3:
1050                         textclass.counters().reset("enumiv");
1051                 }
1052         }
1053 }
1054
1055
1056 // Updates all counters. Paragraphs with changed label string will be rebroken
1057 void LyXText::updateCounters()
1058 {
1059         // start over
1060         bv()->buffer()->params.getLyXTextClass().counters().reset();
1061
1062         ParagraphList::iterator beg = ownerParagraphs().begin();
1063         ParagraphList::iterator end = ownerParagraphs().end();
1064         for (ParagraphList::iterator pit = beg; pit != end; ++pit) {
1065                 string const oldLabel = pit->params().labelString();
1066
1067                 size_t maxdepth = 0;
1068                 if (pit != beg)
1069                         maxdepth = boost::prior(pit)->getMaxDepthAfter();
1070
1071                 if (pit->params().depth() > maxdepth)
1072                         pit->params().depth(maxdepth);
1073
1074                 // setCounter can potentially change the labelString.
1075                 setCounter(*bv()->buffer(), pit);
1076
1077                 string const & newLabel = pit->params().labelString();
1078
1079                 if (oldLabel != newLabel)
1080                         redoParagraph(pit);
1081         }
1082 }
1083
1084
1085 void LyXText::insertInset(InsetOld * inset)
1086 {
1087         if (!cursor.par()->insetAllowed(inset->lyxCode()))
1088                 return;
1089         recordUndo(bv(), Undo::ATOMIC, cursor.par());
1090         freezeUndo();
1091         cursor.par()->insertInset(cursor.pos(), inset);
1092         // Just to rebreak and refresh correctly.
1093         // The character will not be inserted a second time
1094         insertChar(Paragraph::META_INSET);
1095         // If we enter a highly editable inset the cursor should be before
1096         // the inset. After an Undo LyX tries to call inset->edit(...)
1097         // and fails if the cursor is behind the inset and getInset
1098         // does not return the inset!
1099         if (isHighlyEditableInset(inset))
1100                 cursorLeft(true);
1101         unFreezeUndo();
1102 }
1103
1104
1105 void LyXText::cutSelection(bool doclear, bool realcut)
1106 {
1107         // Stuff what we got on the clipboard. Even if there is no selection.
1108
1109         // There is a problem with having the stuffing here in that the
1110         // larger the selection the slower LyX will get. This can be
1111         // solved by running the line below only when the selection has
1112         // finished. The solution used currently just works, to make it
1113         // faster we need to be more clever and probably also have more
1114         // calls to stuffClipboard. (Lgb)
1115         bv()->stuffClipboard(selectionAsString(*bv()->buffer(), true));
1116
1117         // This doesn't make sense, if there is no selection
1118         if (!selection.set())
1119                 return;
1120
1121         // OK, we have a selection. This is always between selection.start
1122         // and selection.end
1123
1124         // make sure that the depth behind the selection are restored, too
1125         ParagraphList::iterator endpit = boost::next(selection.end.par());
1126         ParagraphList::iterator undoendpit = endpit;
1127         ParagraphList::iterator pars_end = ownerParagraphs().end();
1128
1129         if (endpit != pars_end && endpit->getDepth()) {
1130                 while (endpit != pars_end && endpit->getDepth()) {
1131                         ++endpit;
1132                         undoendpit = endpit;
1133                 }
1134         } else if (endpit != pars_end) {
1135                 // because of parindents etc.
1136                 ++endpit;
1137         }
1138
1139         recordUndo(bv(), Undo::DELETE, selection.start.par(),
1140                    boost::prior(undoendpit));
1141
1142         endpit = selection.end.par();
1143         int endpos = selection.end.pos();
1144
1145         boost::tie(endpit, endpos) = realcut ?
1146                 CutAndPaste::cutSelection(bv()->buffer()->params,
1147                                           ownerParagraphs(),
1148                                           selection.start.par(), endpit,
1149                                           selection.start.pos(), endpos,
1150                                           bv()->buffer()->params.textclass,
1151                                           doclear)
1152                 : CutAndPaste::eraseSelection(bv()->buffer()->params,
1153                                               ownerParagraphs(),
1154                                               selection.start.par(), endpit,
1155                                               selection.start.pos(), endpos,
1156                                               doclear);
1157         // sometimes necessary
1158         if (doclear)
1159                 selection.start.par()->stripLeadingSpaces();
1160
1161         redoParagraphs(selection.start.par(), boost::next(endpit));
1162         // cutSelection can invalidate the cursor so we need to set
1163         // it anew. (Lgb)
1164         // we prefer the end for when tracking changes
1165         cursor.pos(endpos);
1166         cursor.par(endpit);
1167
1168         // need a valid cursor. (Lgb)
1169         clearSelection();
1170
1171         setCursor(cursor.par(), cursor.pos());
1172         selection.cursor = cursor;
1173         updateCounters();
1174 }
1175
1176
1177 void LyXText::copySelection()
1178 {
1179         // stuff the selection onto the X clipboard, from an explicit copy request
1180         bv()->stuffClipboard(selectionAsString(*bv()->buffer(), true));
1181
1182         // this doesnt make sense, if there is no selection
1183         if (!selection.set())
1184                 return;
1185
1186         // ok we have a selection. This is always between selection.start
1187         // and sel_end cursor
1188
1189         // copy behind a space if there is one
1190         while (selection.start.par()->size() > selection.start.pos()
1191                && selection.start.par()->isLineSeparator(selection.start.pos())
1192                && (selection.start.par() != selection.end.par()
1193                    || selection.start.pos() < selection.end.pos()))
1194                 selection.start.pos(selection.start.pos() + 1);
1195
1196         CutAndPaste::copySelection(selection.start.par(),
1197                                    selection.end.par(),
1198                                    selection.start.pos(), selection.end.pos(),
1199                                    bv()->buffer()->params.textclass);
1200 }
1201
1202
1203 void LyXText::pasteSelection(size_t sel_index)
1204 {
1205         // this does not make sense, if there is nothing to paste
1206         if (!CutAndPaste::checkPastePossible())
1207                 return;
1208
1209         recordUndo(bv(), Undo::INSERT, cursor.par());
1210
1211         ParagraphList::iterator endpit;
1212         PitPosPair ppp;
1213
1214         ErrorList el;
1215
1216         boost::tie(ppp, endpit) =
1217                 CutAndPaste::pasteSelection(*bv()->buffer(),
1218                                             ownerParagraphs(),
1219                                             cursor.par(), cursor.pos(),
1220                                             bv()->buffer()->params.textclass,
1221                                             sel_index, el);
1222         bufferErrors(*bv()->buffer(), el);
1223         bv()->showErrorList(_("Paste"));
1224
1225         redoParagraphs(cursor.par(), endpit);
1226
1227         setCursor(cursor.par(), cursor.pos());
1228         clearSelection();
1229
1230         selection.cursor = cursor;
1231         setCursor(ppp.first, ppp.second);
1232         setSelection();
1233         updateCounters();
1234 }
1235
1236
1237 void LyXText::setSelectionRange(lyx::pos_type length)
1238 {
1239         if (!length)
1240                 return;
1241
1242         selection.cursor = cursor;
1243         while (length--)
1244                 cursorRight(bv());
1245         setSelection();
1246 }
1247
1248
1249 // simple replacing. The font of the first selected character is used
1250 void LyXText::replaceSelectionWithString(string const & str)
1251 {
1252         recordUndo(bv(), Undo::ATOMIC);
1253         freezeUndo();
1254
1255         if (!selection.set()) { // create a dummy selection
1256                 selection.end = cursor;
1257                 selection.start = cursor;
1258         }
1259
1260         // Get font setting before we cut
1261         pos_type pos = selection.end.pos();
1262         LyXFont const font = selection.start.par()
1263                 ->getFontSettings(bv()->buffer()->params,
1264                                   selection.start.pos());
1265
1266         // Insert the new string
1267         string::const_iterator cit = str.begin();
1268         string::const_iterator end = str.end();
1269         for (; cit != end; ++cit) {
1270                 selection.end.par()->insertChar(pos, (*cit), font);
1271                 ++pos;
1272         }
1273
1274         // Cut the selection
1275         cutSelection(true, false);
1276
1277         unFreezeUndo();
1278 }
1279
1280
1281 // needed to insert the selection
1282 void LyXText::insertStringAsLines(string const & str)
1283 {
1284         ParagraphList::iterator pit = cursor.par();
1285         pos_type pos = cursor.pos();
1286         ParagraphList::iterator endpit = boost::next(cursor.par());
1287
1288         recordUndo(bv(), Undo::ATOMIC);
1289
1290         // only to be sure, should not be neccessary
1291         clearSelection();
1292
1293         bv()->buffer()->insertStringAsLines(pit, pos, current_font, str);
1294
1295         redoParagraphs(cursor.par(), endpit);
1296         setCursor(cursor.par(), cursor.pos());
1297         selection.cursor = cursor;
1298         setCursor(pit, pos);
1299         setSelection();
1300 }
1301
1302
1303 // turns double-CR to single CR, others where converted into one
1304 // blank. Then InsertStringAsLines is called
1305 void LyXText::insertStringAsParagraphs(string const & str)
1306 {
1307         string linestr(str);
1308         bool newline_inserted = false;
1309         string::size_type const siz = linestr.length();
1310
1311         for (string::size_type i = 0; i < siz; ++i) {
1312                 if (linestr[i] == '\n') {
1313                         if (newline_inserted) {
1314                                 // we know that \r will be ignored by
1315                                 // InsertStringA. Of course, it is a dirty
1316                                 // trick, but it works...
1317                                 linestr[i - 1] = '\r';
1318                                 linestr[i] = '\n';
1319                         } else {
1320                                 linestr[i] = ' ';
1321                                 newline_inserted = true;
1322                         }
1323                 } else if (IsPrintable(linestr[i])) {
1324                         newline_inserted = false;
1325                 }
1326         }
1327         insertStringAsLines(linestr);
1328 }
1329
1330
1331 bool LyXText::setCursor(ParagraphList::iterator pit,
1332                         pos_type pos,
1333                         bool setfont, bool boundary)
1334 {
1335         LyXCursor old_cursor = cursor;
1336         setCursorIntern(pit, pos, setfont, boundary);
1337         return deleteEmptyParagraphMechanism(old_cursor);
1338 }
1339
1340
1341 void LyXText::redoCursor()
1342 {
1343 #warning maybe the same for selections?
1344         setCursor(cursor, cursor.par(), cursor.pos(), cursor.boundary());
1345 }
1346
1347
1348 void LyXText::setCursor(LyXCursor & cur, ParagraphList::iterator pit,
1349                         pos_type pos, bool boundary)
1350 {
1351         Assert(pit != ownerParagraphs().end());
1352
1353         cur.par(pit);
1354         cur.pos(pos);
1355         cur.boundary(boundary);
1356         if (noRows())
1357                 return;
1358
1359         // get the cursor y position in text
1360
1361         RowList::iterator row = getRow(pit, pos);
1362         int y = row->y();
1363
1364         RowList::iterator old_row = row;
1365         // if we are before the first char of this row and are still in the
1366         // same paragraph and there is a previous row then put the cursor on
1367         // the end of the previous row
1368         cur.iy(y + row->baseline());
1369
1370         // y is now the beginning of the cursor row
1371         y += row->baseline();
1372         // y is now the cursor baseline
1373         cur.y(y);
1374
1375         pos_type last = lastPrintablePos(*pit, old_row);
1376
1377         // None of these should happen, but we're scaredy-cats
1378         if (pos > pit->size()) {
1379                 lyxerr << "dont like 1, pos: " << pos << " size: " << pit->size() << endl;
1380                 pos = 0;
1381                 cur.pos(0);
1382         } else if (pos > last + 1) {
1383                 lyxerr << "dont like 2 please report" << endl;
1384                 // This shouldn't happen.
1385                 pos = last + 1;
1386                 cur.pos(pos);
1387         } else if (pos < row->pos()) {
1388                 lyxerr << "dont like 3 please report" << endl;
1389                 pos = row->pos();
1390                 cur.pos(pos);
1391         }
1392
1393         // now get the cursors x position
1394         float x = getCursorX(pit, row, pos, last, boundary);
1395         cur.x(int(x));
1396         cur.x_fix(cur.x());
1397         if (old_row != row) {
1398                 x = getCursorX(pit, old_row, pos, last, boundary);
1399                 cur.ix(int(x));
1400         } else
1401                 cur.ix(cur.x());
1402 }
1403
1404
1405 float LyXText::getCursorX(ParagraphList::iterator pit, RowList::iterator rit,
1406                           pos_type pos, pos_type last, bool boundary) const
1407 {
1408         pos_type cursor_vpos    = 0;
1409         double x                = rit->x();
1410         double fill_separator   = rit->fill_separator();
1411         double fill_hfill       = rit->fill_hfill();
1412         double fill_label_hfill = rit->fill_label_hfill();
1413         pos_type const rit_pos  = rit->pos();
1414
1415         if (last < rit_pos)
1416                 cursor_vpos = rit_pos;
1417         else if (pos > last && !boundary)
1418                 cursor_vpos = (pit->isRightToLeftPar(bv()->buffer()->params))
1419                         ? rit_pos : last + 1;
1420         else if (pos > rit_pos && (pos > last || boundary))
1421                 // Place cursor after char at (logical) position pos - 1
1422                 cursor_vpos = (bidi_level(pos - 1) % 2 == 0)
1423                         ? log2vis(pos - 1) + 1 : log2vis(pos - 1);
1424         else
1425                 // Place cursor before char at (logical) position pos
1426                 cursor_vpos = (bidi_level(pos) % 2 == 0)
1427                         ? log2vis(pos) : log2vis(pos) + 1;
1428
1429         pos_type body_pos = pit->beginningOfBody();
1430         if (body_pos > 0 &&
1431             (body_pos - 1 > last || !pit->isLineSeparator(body_pos - 1)))
1432                 body_pos = 0;
1433
1434         for (pos_type vpos = rit_pos; vpos < cursor_vpos; ++vpos) {
1435                 pos_type pos = vis2log(vpos);
1436                 if (body_pos > 0 && pos == body_pos - 1) {
1437                         x += fill_label_hfill +
1438                                 font_metrics::width(
1439                                         pit->layout()->labelsep, getLabelFont(pit));
1440                         if (pit->isLineSeparator(body_pos - 1))
1441                                 x -= singleWidth(pit, body_pos - 1);
1442                 }
1443
1444                 if (hfillExpansion(*pit, rit, pos)) {
1445                         x += singleWidth(pit, pos);
1446                         if (pos >= body_pos)
1447                                 x += fill_hfill;
1448                         else
1449                                 x += fill_label_hfill;
1450                 } else if (pit->isSeparator(pos)) {
1451                         x += singleWidth(pit, pos);
1452                         if (pos >= body_pos)
1453                                 x += fill_separator;
1454                 } else
1455                         x += singleWidth(pit, pos);
1456         }
1457         return x;
1458 }
1459
1460
1461 void LyXText::setCursorIntern(ParagraphList::iterator pit,
1462                               pos_type pos, bool setfont, bool boundary)
1463 {
1464         setCursor(cursor, pit, pos, boundary);
1465         if (setfont)
1466                 setCurrentFont();
1467 }
1468
1469
1470 void LyXText::setCurrentFont()
1471 {
1472         pos_type pos = cursor.pos();
1473         ParagraphList::iterator pit = cursor.par();
1474
1475         if (cursor.boundary() && pos > 0)
1476                 --pos;
1477
1478         if (pos > 0) {
1479                 if (pos == pit->size())
1480                         --pos;
1481                 else // potentional bug... BUG (Lgb)
1482                         if (pit->isSeparator(pos)) {
1483                                 if (pos > cursorRow()->pos() &&
1484                                     bidi_level(pos) % 2 ==
1485                                     bidi_level(pos - 1) % 2)
1486                                         --pos;
1487                                 else if (pos + 1 < pit->size())
1488                                         ++pos;
1489                         }
1490         }
1491
1492         current_font = pit->getFontSettings(bv()->buffer()->params, pos);
1493         real_current_font = getFont(pit, pos);
1494
1495         if (cursor.pos() == pit->size() &&
1496             isBoundary(*bv()->buffer(), *pit, cursor.pos()) &&
1497             !cursor.boundary()) {
1498                 Language const * lang =
1499                         pit->getParLanguage(bv()->buffer()->params);
1500                 current_font.setLanguage(lang);
1501                 current_font.setNumber(LyXFont::OFF);
1502                 real_current_font.setLanguage(lang);
1503                 real_current_font.setNumber(LyXFont::OFF);
1504         }
1505 }
1506
1507
1508 // returns the column near the specified x-coordinate of the row
1509 // x is set to the real beginning of this column
1510 pos_type LyXText::getColumnNearX(ParagraphList::iterator pit,
1511         RowList::iterator rit, int & x, bool & boundary) const
1512 {
1513         double tmpx             = rit->x();
1514         double fill_separator   = rit->fill_separator();
1515         double fill_hfill       = rit->fill_hfill();
1516         double fill_label_hfill = rit->fill_label_hfill();
1517
1518         pos_type vc = rit->pos();
1519         pos_type last = lastPrintablePos(*pit, rit);
1520         pos_type c = 0;
1521         LyXLayout_ptr const & layout = pit->layout();
1522
1523         bool left_side = false;
1524
1525         pos_type body_pos = pit->beginningOfBody();
1526         double last_tmpx = tmpx;
1527
1528         if (body_pos > 0 &&
1529             (body_pos - 1 > last ||
1530              !pit->isLineSeparator(body_pos - 1)))
1531                 body_pos = 0;
1532
1533         // check for empty row
1534         if (!pit->size()) {
1535                 x = int(tmpx);
1536                 return 0;
1537         }
1538
1539         while (vc <= last && tmpx <= x) {
1540                 c = vis2log(vc);
1541                 last_tmpx = tmpx;
1542                 if (body_pos > 0 && c == body_pos - 1) {
1543                         tmpx += fill_label_hfill +
1544                                 font_metrics::width(layout->labelsep, getLabelFont(pit));
1545                         if (pit->isLineSeparator(body_pos - 1))
1546                                 tmpx -= singleWidth(pit, body_pos - 1);
1547                 }
1548
1549                 if (hfillExpansion(*pit, rit, c)) {
1550                         tmpx += singleWidth(pit, c);
1551                         if (c >= body_pos)
1552                                 tmpx += fill_hfill;
1553                         else
1554                                 tmpx += fill_label_hfill;
1555                 } else if (pit->isSeparator(c)) {
1556                         tmpx += singleWidth(pit, c);
1557                         if (c >= body_pos)
1558                                 tmpx += fill_separator;
1559                 } else {
1560                         tmpx += singleWidth(pit, c);
1561                 }
1562                 ++vc;
1563         }
1564
1565         if ((tmpx + last_tmpx) / 2 > x) {
1566                 tmpx = last_tmpx;
1567                 left_side = true;
1568         }
1569
1570         if (vc > last + 1)  // This shouldn't happen.
1571                 vc = last + 1;
1572
1573         boundary = false;
1574         // This (rtl_support test) is not needed, but gives
1575         // some speedup if rtl_support == false
1576         bool const lastrow = lyxrc.rtl_support
1577                         && boost::next(rit) == pit->rows.end();
1578
1579         // If lastrow is false, we don't need to compute
1580         // the value of rtl.
1581         bool const rtl = (lastrow)
1582                 ? pit->isRightToLeftPar(bv()->buffer()->params)
1583                 : false;
1584         if (lastrow &&
1585                  ((rtl  &&  left_side && vc == rit->pos() && x < tmpx - 5) ||
1586                   (!rtl && !left_side && vc == last + 1   && x > tmpx + 5)))
1587                 c = last + 1;
1588         else if (vc == rit->pos()) {
1589                 c = vis2log(vc);
1590                 if (bidi_level(c) % 2 == 1)
1591                         ++c;
1592         } else {
1593                 c = vis2log(vc - 1);
1594                 bool const rtl = (bidi_level(c) % 2 == 1);
1595                 if (left_side == rtl) {
1596                         ++c;
1597                         boundary = isBoundary(*bv()->buffer(), *pit, c);
1598                 }
1599         }
1600
1601         if (rit->pos() <= last && c > last && pit->isNewline(last)) {
1602                 if (bidi_level(last) % 2 == 0)
1603                         tmpx -= singleWidth(pit, last);
1604                 else
1605                         tmpx += singleWidth(pit, last);
1606                 c = last;
1607         }
1608
1609         c -= rit->pos();
1610         x = int(tmpx);
1611         return c;
1612 }
1613
1614
1615 void LyXText::setCursorFromCoordinates(int x, int y)
1616 {
1617         LyXCursor old_cursor = cursor;
1618         setCursorFromCoordinates(cursor, x, y);
1619         setCurrentFont();
1620         deleteEmptyParagraphMechanism(old_cursor);
1621 }
1622
1623
1624 void LyXText::setCursorFromCoordinates(LyXCursor & cur, int x, int y)
1625 {
1626         // Get the row first.
1627         ParagraphList::iterator pit;
1628         RowList::iterator rit = getRowNearY(y, pit);
1629         y = rit->y();
1630
1631         bool bound = false;
1632         pos_type const column = getColumnNearX(pit, rit, x, bound);
1633         cur.par(pit);
1634         cur.pos(rit->pos() + column);
1635         cur.x(x);
1636         cur.y(y + rit->baseline());
1637
1638         cur.iy(cur.y());
1639         cur.ix(cur.x());
1640
1641         cur.boundary(bound);
1642 }
1643
1644
1645 void LyXText::cursorLeft(bool internal)
1646 {
1647         if (cursor.pos() > 0) {
1648                 bool boundary = cursor.boundary();
1649                 setCursor(cursor.par(), cursor.pos() - 1, true, false);
1650                 if (!internal && !boundary &&
1651                     isBoundary(*bv()->buffer(), *cursor.par(), cursor.pos() + 1))
1652                         setCursor(cursor.par(), cursor.pos() + 1, true, true);
1653         } else if (cursor.par() != ownerParagraphs().begin()) {
1654                 // steps into the paragraph above
1655                 ParagraphList::iterator pit = boost::prior(cursor.par());
1656                 setCursor(pit, pit->size());
1657         }
1658 }
1659
1660
1661 void LyXText::cursorRight(bool internal)
1662 {
1663         bool const at_end = (cursor.pos() == cursor.par()->size());
1664         bool const at_newline = !at_end &&
1665                 cursor.par()->isNewline(cursor.pos());
1666
1667         if (!internal && cursor.boundary() && !at_newline)
1668                 setCursor(cursor.par(), cursor.pos(), true, false);
1669         else if (!at_end) {
1670                 setCursor(cursor.par(), cursor.pos() + 1, true, false);
1671                 if (!internal &&
1672                     isBoundary(*bv()->buffer(), *cursor.par(), cursor.pos()))
1673                         setCursor(cursor.par(), cursor.pos(), true, true);
1674         } else if (boost::next(cursor.par()) != ownerParagraphs().end())
1675                 setCursor(boost::next(cursor.par()), 0);
1676 }
1677
1678
1679 void LyXText::cursorUp(bool selecting)
1680 {
1681 #if 1
1682         int x = cursor.x_fix();
1683         int y = cursor.y() - cursorRow()->baseline() - 1;
1684         setCursorFromCoordinates(x, y);
1685         if (!selecting) {
1686                 int topy = bv_owner->top_y();
1687                 int y1 = cursor.iy() - topy;
1688                 int y2 = y1;
1689                 y -= topy;
1690                 InsetOld * inset_hit = checkInsetHit(x, y1);
1691                 if (inset_hit && isHighlyEditableInset(inset_hit)) {
1692                         inset_hit->localDispatch(
1693                                 FuncRequest(bv(), LFUN_INSET_EDIT, x, y - (y2 - y1), mouse_button::none));
1694                 }
1695         }
1696 #else
1697         lyxerr << "cursorUp: y " << cursor.y() << " bl: " <<
1698                 cursorRow()->baseline() << endl;
1699         setCursorFromCoordinates(cursor.x_fix(),
1700                 cursor.y() - cursorRow()->baseline() - 1);
1701 #endif
1702 }
1703
1704
1705 void LyXText::cursorDown(bool selecting)
1706 {
1707 #if 1
1708         int x = cursor.x_fix();
1709         int y = cursor.y() - cursorRow()->baseline() + cursorRow()->height() + 1;
1710         setCursorFromCoordinates(x, y);
1711         if (!selecting && cursorRow() == cursorIRow()) {
1712                 int topy = bv_owner->top_y();
1713                 int y1 = cursor.iy() - topy;
1714                 int y2 = y1;
1715                 y -= topy;
1716                 InsetOld * inset_hit = checkInsetHit(x, y1);
1717                 if (inset_hit && isHighlyEditableInset(inset_hit)) {
1718                         FuncRequest cmd(bv(), LFUN_INSET_EDIT, x, y - (y2 - y1), mouse_button::none);
1719                         inset_hit->localDispatch(cmd);
1720                 }
1721         }
1722 #else
1723         setCursorFromCoordinates(cursor.x_fix(),
1724                  cursor.y() - cursorRow()->baseline() + cursorRow()->height() + 1);
1725 #endif
1726 }
1727
1728
1729 void LyXText::cursorUpParagraph()
1730 {
1731         if (cursor.pos() > 0)
1732                 setCursor(cursor.par(), 0);
1733         else if (cursor.par() != ownerParagraphs().begin())
1734                 setCursor(boost::prior(cursor.par()), 0);
1735 }
1736
1737
1738 void LyXText::cursorDownParagraph()
1739 {
1740         ParagraphList::iterator par = cursor.par();
1741         ParagraphList::iterator next_par = boost::next(par);
1742
1743         if (next_par != ownerParagraphs().end())
1744                 setCursor(next_par, 0);
1745         else
1746                 setCursor(par, par->size());
1747 }
1748
1749
1750 // fix the cursor `cur' after a characters has been deleted at `where'
1751 // position. Called by deleteEmptyParagraphMechanism
1752 void LyXText::fixCursorAfterDelete(LyXCursor & cur, LyXCursor const & where)
1753 {
1754         // if cursor is not in the paragraph where the delete occured,
1755         // do nothing
1756         if (cur.par() != where.par())
1757                 return;
1758
1759         // if cursor position is after the place where the delete occured,
1760         // update it
1761         if (cur.pos() > where.pos())
1762                 cur.pos(cur.pos()-1);
1763
1764         // check also if we don't want to set the cursor on a spot behind the
1765         // pagragraph because we erased the last character.
1766         if (cur.pos() > cur.par()->size())
1767                 cur.pos(cur.par()->size());
1768
1769         // recompute row et al. for this cursor
1770         setCursor(cur, cur.par(), cur.pos(), cur.boundary());
1771 }
1772
1773
1774 bool LyXText::deleteEmptyParagraphMechanism(LyXCursor const & old_cursor)
1775 {
1776         // Would be wrong to delete anything if we have a selection.
1777         if (selection.set())
1778                 return false;
1779
1780         // We allow all kinds of "mumbo-jumbo" when freespacing.
1781         if (old_cursor.par()->isFreeSpacing())
1782                 return false;
1783
1784         /* Ok I'll put some comments here about what is missing.
1785            I have fixed BackSpace (and thus Delete) to not delete
1786            double-spaces automagically. I have also changed Cut,
1787            Copy and Paste to hopefully do some sensible things.
1788            There are still some small problems that can lead to
1789            double spaces stored in the document file or space at
1790            the beginning of paragraphs. This happens if you have
1791            the cursor between to spaces and then save. Or if you
1792            cut and paste and the selection have a space at the
1793            beginning and then save right after the paste. I am
1794            sure none of these are very hard to fix, but I will
1795            put out 1.1.4pre2 with FIX_DOUBLE_SPACE defined so
1796            that I can get some feedback. (Lgb)
1797         */
1798
1799         // If old_cursor.pos() == 0 and old_cursor.pos()(1) == LineSeparator
1800         // delete the LineSeparator.
1801         // MISSING
1802
1803         // If old_cursor.pos() == 1 and old_cursor.pos()(0) == LineSeparator
1804         // delete the LineSeparator.
1805         // MISSING
1806
1807         // If the pos around the old_cursor were spaces, delete one of them.
1808         if (old_cursor.par() != cursor.par()
1809             || old_cursor.pos() != cursor.pos()) {
1810
1811                 // Only if the cursor has really moved
1812                 if (old_cursor.pos() > 0
1813                     && old_cursor.pos() < old_cursor.par()->size()
1814                     && old_cursor.par()->isLineSeparator(old_cursor.pos())
1815                     && old_cursor.par()->isLineSeparator(old_cursor.pos() - 1)) {
1816                         bool erased = old_cursor.par()->erase(old_cursor.pos() - 1);
1817                         redoParagraph(old_cursor.par());
1818
1819                         if (!erased)
1820                                 return false;
1821 #ifdef WITH_WARNINGS
1822 #warning This will not work anymore when we have multiple views of the same buffer
1823 // In this case, we will have to correct also the cursors held by
1824 // other bufferviews. It will probably be easier to do that in a more
1825 // automated way in LyXCursor code. (JMarc 26/09/2001)
1826 #endif
1827                         // correct all cursors held by the LyXText
1828                         fixCursorAfterDelete(cursor, old_cursor);
1829                         fixCursorAfterDelete(selection.cursor, old_cursor);
1830                         fixCursorAfterDelete(selection.start, old_cursor);
1831                         fixCursorAfterDelete(selection.end, old_cursor);
1832                         return false;
1833                 }
1834         }
1835
1836         // don't delete anything if this is the ONLY paragraph!
1837         if (ownerParagraphs().size() == 1)
1838                 return false;
1839
1840         // Do not delete empty paragraphs with keepempty set.
1841         if (old_cursor.par()->allowEmpty())
1842                 return false;
1843
1844         // only do our magic if we changed paragraph
1845         if (old_cursor.par() == cursor.par())
1846                 return false;
1847
1848         // record if we have deleted a paragraph
1849         // we can't possibly have deleted a paragraph before this point
1850         bool deleted = false;
1851
1852         if (old_cursor.par()->empty() ||
1853             (old_cursor.par()->size() == 1 &&
1854              old_cursor.par()->isLineSeparator(0))) {
1855                 // ok, we will delete something
1856                 LyXCursor tmpcursor;
1857
1858                 deleted = true;
1859
1860                 bool selection_position_was_oldcursor_position = (
1861                         selection.cursor.par()  == old_cursor.par()
1862                         && selection.cursor.pos() == old_cursor.pos());
1863
1864                 tmpcursor = cursor;
1865                 cursor = old_cursor; // that undo can restore the right cursor position
1866
1867                 ParagraphList::iterator endpit = boost::next(old_cursor.par());
1868                 while (endpit != ownerParagraphs().end() && endpit->getDepth())
1869                         ++endpit;
1870
1871                 recordUndo(bv(), Undo::DELETE, old_cursor.par(), boost::prior(endpit));
1872                 cursor = tmpcursor;
1873
1874                 // delete old par
1875                 ownerParagraphs().erase(old_cursor.par());
1876                 redoParagraph();
1877
1878                 // correct cursor y
1879                 setCursorIntern(cursor.par(), cursor.pos());
1880
1881                 if (selection_position_was_oldcursor_position) {
1882                         // correct selection
1883                         selection.cursor = cursor;
1884                 }
1885         }
1886         if (!deleted) {
1887                 if (old_cursor.par()->stripLeadingSpaces()) {
1888                         redoParagraph(old_cursor.par());
1889                         // correct cursor y
1890                         setCursorIntern(cursor.par(), cursor.pos());
1891                         selection.cursor = cursor;
1892                 }
1893         }
1894         return deleted;
1895 }
1896
1897
1898 ParagraphList & LyXText::ownerParagraphs() const
1899 {
1900         return paragraphs_;
1901 }
1902
1903
1904 bool LyXText::isInInset() const
1905 {
1906         // Sub-level has non-null bv owner and non-null inset owner.
1907         return inset_owner != 0;
1908 }
1909
1910
1911 int defaultRowHeight()
1912 {
1913         LyXFont const font(LyXFont::ALL_SANE);
1914         return int(font_metrics::maxAscent(font)
1915                  + font_metrics::maxDescent(font) * 1.5);
1916 }